Selective Restraint

The sad case of Terri Schiavo has raised passions not seen since five years ago. Then another bitterly divided family argued in Florida courts over someone who couldn't speak on his own behalf: Elian Gonzalez.

In both cases, those who were unhappy with the courts' decisions strained to assert the federal government's power to produce a different outcome. The difference is that in Mrs. Schiavo's case, Congress backed off after passing a bill that merely asked a federal court to hear the case from scratch, something that...